Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Risks of Melanotan: TGA to issue fresh warning against 'Barbie drug' The Australian Melanotan II Erectile Dysfunction: What the Evidence Shows and Practical Considerations View of Association of tanning injection with hypercortisolism, hyperglycaemia and ketosis in type 1 diabetes mellitus British Journal of Diabetes